Travel time may be another issue facing California's controversial bullet train.

When voters approved funding for the high speed rail project in 2008, they were told it would take two hours and 40 minutes to run between San Francisco and Los Angeles.  

But now the scheduled time is 28 minutes longer. 

"Which allows for driver problems, it allows for weather, it allows for interference with trains, it's always longer than the pure running time in any case," said Lou Thompson.

Thompson, chairman of the High-Speed Rail Peer Review Group, says he doesn't believe the extra run time will deter travelers. 

The bigger issue is how to fully pay for it.